63291992087 has 4 divisors (see below), whose sum is σ = 63918645576. Its totient is φ = 62665338600.

The previous prime is 63291992041. The next prime is 63291992149. The reversal of 63291992087 is 78029919236.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63291992087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63291902087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313326593 + ... + 313326794.

It is an arithmetic number, because the mean of its divisors is an integer number (15979661394).

Almost surely, 2^63291992087 is an apocalyptic number.

63291992087 is a deficient number, since it is larger than the sum of its proper divisors (626653489).

63291992087 is a wasteful number, since it uses less digits than its factorization.

63291992087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626653488.

The product of its (nonzero) digits is 2939328, while the sum is 56.

The spelling of 63291992087 in words is "sixty-three billion, two hundred ninety-one million, nine hundred ninety-two thousand, eighty-seven".